Backend Engineering

Rust-focused backend patterns. Where possible, notes explain both the Rust-specific API and the underlying concept.

Subsections

Axum	Router, extractors, middleware, state management
SQLx	Async queries, compile-time verification, transactions, migrations
Tracing	tracing crate, structured logging, spans, OpenTelemetry export
Auth	JWT, session tokens, PASETO, OAuth2, middleware patterns
Caching	Redis, in-memory, cache invalidation strategies, CDN
Databases	Indexes, isolation levels, connection pooling, migrations